cygport cygautoreconf failure with AC_CONFIG_MACRO_DIRS

[Jon Turney]

On 09/08/2023 23:44, Brian Inglis via Cygwin-apps wrote:
> On 2023-08-09 15:55, Jon Turney via Cygwin-apps wrote:
[...]
> 
>> That leaves the second part of your patch.  I'm not sure if you're 
>> claiming this is the same problem, a similar problem, or a different 
>> problem.
> 
> That adds cygport cygautoreconf support for a newer AC_CONFIG_MACRO_DIRS 
> macro to existing support for the older AC_CONFIG_MACRO_DIR macro.

Thanks.

I applied this part.

I also adjusted the similar uses of AC_CONFIG_MACRO_DIR in gnome2, mate 
and xfce4 cygclasses.

To be hyper-correct, I guess that perhaps the regex expression to use 
here is 'S?' rather than 'S*', but that doesn't seem important.